/*
 * Copyright (c) 2005-2006,2012 Intel Corporation.  All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * $Id$
 */


#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>

#include <rdma/rdma_cma.h>
#include "include/common.h"

int use_rs = 1;

int get_rdma_addr(const char *src, const char *dst, const char *port,
                  struct rdma_addrinfo *hints, struct rdma_addrinfo **rai) {
    struct rdma_addrinfo rai_hints, *res;
    int ret;

    if (hints->ai_flags & RAI_PASSIVE)
        return rdma_getaddrinfo(src, port, hints, rai);

    rai_hints = *hints;
    if (src) {
        rai_hints.ai_flags |= RAI_PASSIVE;
        ret = rdma_getaddrinfo(src, NULL, &rai_hints, &res);
        if (ret)
            return ret;

        rai_hints.ai_src_addr = res->ai_src_addr;
        rai_hints.ai_src_len = res->ai_src_len;
        rai_hints.ai_flags &= ~RAI_PASSIVE;
    }

    ret = rdma_getaddrinfo(dst, port, &rai_hints, rai);
    if (src)
        rdma_freeaddrinfo(res);

    return ret;
}

void size_str(char *str, size_t ssize, long long size) {
    long long base, fraction = 0;
    char mag;

    if (size >= (1 << 30)) {
        base = 1 << 30;
        mag = 'g';
    } else if (size >= (1 << 20)) {
        base = 1 << 20;
        mag = 'm';
    } else if (size >= (1 << 10)) {
        base = 1 << 10;
        mag = 'k';
    } else {
        base = 1;
        mag = '\0';
    }

    if (size / base < 10)
        fraction = (size % base) * 10 / base;
    if (fraction) {
        snprintf(str, ssize, "%lld.%lld%c", size / base, fraction, mag);
    } else {
        snprintf(str, ssize, "%lld%c", size / base, mag);
    }
}

void cnt_str(char *str, size_t ssize, long long cnt) {
    if (cnt >= 1000000000)
        snprintf(str, ssize, "%lldb", cnt / 1000000000);
    else if (cnt >= 1000000)
        snprintf(str, ssize, "%lldm", cnt / 1000000);
    else if (cnt >= 1000)
        snprintf(str, ssize, "%lldk", cnt / 1000);
    else
        snprintf(str, ssize, "%lld", cnt);
}

int size_to_count(int size) {
    if (size >= (1 << 20))
        return 100;
    else if (size >= (1 << 16))
        return 1000;
    else if (size >= (1 << 10))
        return 10000;
    else
        return 100000;
}

void format_buf(void *buf, int size) {
    uint8_t *array = buf;
    static uint8_t data;
    int i;

    for (i = 0; i < size; i++)
        array[i] = data++;
}

int verify_buf(void *buf, int size) {
    static long long total_bytes;
    uint8_t *array = buf;
    static uint8_t data;
    int i;

    for (i = 0; i < size; i++, total_bytes++) {
        if (array[i] != data++) {
            printf("data verification failed byte %lld\n", total_bytes);
            return -1;
        }
    }
    return 0;
}

int do_poll(struct pollfd *fds, int timeout) {
    int ret;

    do {
        ret = rs_poll(fds, 1, timeout);
    } while (!ret);

    return ret == 1 ? (fds->revents & (POLLERR | POLLHUP)) : ret;
}

struct rdma_event_channel *create_first_event_channel(void) {
    struct rdma_event_channel *channel;

    channel = rdma_create_event_channel();
    if (!channel) {
        if (errno == ENODEV)
            fprintf(stderr, "No RDMA devices were detected\n");
        else
            perror("failed to create RDMA CM event channel");
    }
    return channel;
}

